SU1637665A3

SU1637665A3 - Method of gallium extraction from aqueous strong alkalinous solution of sodium aluminate

Info

Publication number: SU1637665A3
Application number: SU874203493A
Authority: SU
Inventors: Ламеран Жан-Мишель
Original assignee: Алюминиюм Пешинэ (Фирма)
Priority date: 1986-10-24
Filing date: 1987-10-22
Publication date: 1991-03-23
Also published as: CA1332109C; EP0265356A1; GR3000806T3; AU8007287A; HU200802B; YU45043B; JPH0438453B2; EP0265356B1; ES2015319B3; CN1010595B; HUT45567A; DE3762885D1; AU591354B2; FR2605646A1; BR8705694A; JPS63123439A; IE872850L; FR2605646B1; IE60593B1; CN87106967A

Abstract

1. A method of recovering the gallium contained in an aqueous solution of highly alkaline sodium aluminate by exchange of chemical species between a stationary phase consisting of a microporous adsorbent resin impregnated with a 7-alkenyl 8-hydroxy quinoline charge and the aqueous phase of sodium aluminate characterised by the fact that prior to impregnation the dry resin has a specific surface area, measured by the BET method, which is at least equal to 450 sq.m/g of resin, a pore volume at least equal to 1500 cu.mm/g of resin, a mean pore diameter of between 8.0 and 50.0 nm with at least 80% of this volume consisting of pores of a diameter comprised between 4.0 and 500.0 nm, an expansion rate in an aqueous medium not exceeding 20%, and in that it is impregnated with 7-alkyl or alkenyl 8-hydroxy in a proportion of 250 to 350 g per litre of dry resin.

Description

Изобретение относитс к металлургии , в частности касаетс извлечени галли из алюминатных растворов производства Байера.This invention relates to metallurgy, in particular, to the recovery of gallium from aluminate solutions manufactured by Bayer.

Цель изобретени - повышение степени извлечени галли непосредственно из растворов производства Байера.The purpose of the invention is to increase the degree of gallium extraction directly from Bayer solutions.

Пример 2,9л смолы Амберлит ХАД 1180 сушат в шкафу при 80°С до посто нного веса. Эту смолу ввод т в контакт с раствором 7-(5,5,7,7-тетра- метил-1-октен-3-ил)-8-оксохинолина (ТМООХ) в спирте, предпочтительно, в этаноле до концентраций 15-30 мас.%Example 2.9 l of Amberlite XAD 1180 resin dried in a cabinet at 80 ° C to constant weight. This resin is contacted with a solution of 7- (5,5,7,7-tetramethyl-1-octene-3-yl) -8-oxoquinoline (TMOOH) in alcohol, preferably in ethanol, to concentrations of 15-30 wt.%

этого соединени в этанопе. В данном случае эта величина составл ет 15 мас.%. Количество раствора дл пропитки рассчитывают таким образом, чтобы отношение экстрагента к объему сухой смолы составл ло 250-350 г на 1 л. В данном примере эта величина составл ет 275 г/л0of this compound in ethanope. In this case, this value is 15% by weight. The amount of impregnation solution is calculated so that the ratio of extractant to the volume of dry resin is 250-350 g per liter. In this example, this value is 275 g / l0.

Эта операци может быть осуществлена в одну или несколько последовательных стадий с промежуточным высушиванием при 60°С под вакуумом, что позвол ет удал ть этанол и контрооэThis operation can be carried out in one or several successive stages with intermediate drying at 60 ° C under vacuum, which allows the removal of ethanol and control.

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лировать количество адсорбированного экстрагента.To add the amount of adsorbed extractant.

После последней сушки под вакуумом смолу пропитывают деионизированноЙ водой, дегазируют под вакуумом, затем загружают в колонну. Объем пор используемой смолы равен 1500 мм3/г сухой смолы, средний диаметр пор составл ет 80-500 X, при этом по крайней мере 80% объема пор образовано порами диаметром 40-5000 А. Степень набухани смолы в водной среде не превышает 20%. Полученна после пропитки масса соответствует фик- сации почти всего ТМООХ. Объем смолы в колонне составл ет 3,2 л с высотой сло 30 см. 80 л разложенной жидкости Байера, содержащей 80-140 г/л гидроксида натри , 60-110 г/л окиси алюмини и 150-350 мг/л галли , температурой 40°С пропускают через смолу со скоростью 20 л/ч о Содержание в растворе галли составл ет в начале процесса при вводе в колонну 240After the last drying under vacuum, the resin is impregnated with deionized water, degassed under vacuum, then loaded into a column. The pore volume of the resin used is 1500 mm3 / g dry resin, the average pore diameter is 80-500 X, with at least 80% of the pore volume formed by pores with a diameter of 40-5000 A. The degree of swelling of the resin in an aqueous medium does not exceed 20%. The mass obtained after impregnation corresponds to the fixation of almost the entire TMOOX. The volume of resin in the column is 3.2 liters with a layer height of 30 cm. 80 liters of Bayer liquid, containing 80-140 g / l of sodium hydroxide, 60-110 g / l of alumina and 150-350 mg / l of gallium, with a temperature of 40 ° C is passed through the resin at a rate of 20 l / h o The content in the gallium solution is at the beginning of the process when entering the column 240

и 90 мг/л по окончании процесса.and 90 mg / l at the end of the process.

После промывки смолы 6 л воды через колонну пропускают 4,3 н.раствор серной кислоты при расходе 20 л/ч в течение 30 мин.After washing the resin with 6 liters of water, 4.3 n sulfuric acid solution is passed through the column at a flow rate of 20 l / h for 30 minutes.

Максимальна концентраци галли в растворе серной кислоты после пропускани через смолу составл ет 6,8 г/л в 3,2 л раствора. Анализ полученных растворов показывает, что смола фиксирует 3,75 г галли на литр смолы в колонне.The maximum concentration of gallium in a solution of sulfuric acid after passing through the resin is 6.8 g / l in 3.2 l of solution. Analysis of the solutions obtained shows that the resin fixes 3.75 g of gallium per liter of resin in the column.

Таким образом, предлагаемый способ позвол ет осуществл ть извлечение галли непосредственно из растворов производства Байера.Thus, the proposed method allows the extraction of gallium directly from Bayer production solutions.

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Claims

1. A method for extracting gallium from a highly alkaline aqueous solution of sodium aluminate, comprising contacting, at 40-60 ° C, a solution of sodium aluminate containing gallium with a microporous adsorption resin impregnated with 7-alkyl- or 7-alkenyl-8-oxyquinoline organic reagent in a diluent , and the subsequent elution of gallium with a solution of sulfuric acid, characterized in that, in order to increase the degree of gallium recovery,

from solutions of Eyyer production, the contacting of the gallium-containing solution is carried out with a non-polar and hydrophobic polystyrene-based resin with a specific surface area of 450 mg / l, with a pair volume of at least 1500 mm3 per 1 g of resin, with an average pore diameter of 80-500 A, 80% of the pore volume is pores with a diameter of 40-5000 A with an expansion coefficient in an aqueous medium of not more than 20% by volume, using 7- (5,5,7,7-tetramethyl-1-octene) as an organic reagent during impregnation -3-yl) -8-hydroxyquinoline in the amount of 250-350 g per 1 liter of dry resin, diluted 10-30% ethanol, and gallium is extracted from Bayer solutions containing 80-140 g / l of sodium hydroxide, 60-110 g / l of alumina and 150-350 mg / l of gallium at a ratio of Bayer initial solution and resin 2-10: 1.

2. A method according to claim 1, characterized in that the elution is carried out at a concentration of sulfuric acid of 3-6 N. when the ratio of the volumes of solution of sulfuric acid and resin 2-10: 1.